Disconnect means for a pump drive



June 19, 1962 H. R. WILSQN DISCONNEICT MEANS FOR A PUMP DRIVE 2 Sheets-Sheet 1 Filed July 21, 1960 Z Z6 ZaZ June 19, 1962 H. R. WILSON 3,039,317

DISCONNECT MEANS FOR A PUMP DRIVE Filed July 21, 1960 2 Sheets-Sheet 2 JDVVENTOB BE 9 %1Ls0- firTOEA/Eg V United States Patent 3,039,317 DISCONNECT MEANS FOR A PUMP DRIVE Harry R. Wilson, Libertyviile, Ill., assignor to The Frank G. Hough Co., a corporation of Illinois Filed July 21, 1960, Ser. No. 44,359 4 Claims. (Cl. 74-11) This invention relates generally to power take-off devices for engines, and more specifically to an improved power take-off arrangement on an engine for a pair of hydraulic pumps.

In the driving of auxiliary equipment from the engine of a motor vehicle, it is often desirable to drive two auxiliary devices from a single power take-off point; and further, simple coupling or uncoupling means for one of the devices is also desirable.

It is the object of the present invention to provide a certain power take-off arrangement for an internal combustion engine wherein a pair of auxiliary devices are driven from the engine.

It is a further object of the present invention to provide in the aforementioned arrangement simple means for coupling or uncoupling one of the devices from the power take-0E arrangement on the engine.

It is a further object of the present invention to provide a simple mounting arrangement for a pair of hydraulic pumps on a single pump drive housing which in turn is carried on an engine, and whereby one of the pumps may be selectively disengaged from the power take-off means.

A feature of the present invention is provision of a certain simple reciprocating shaft arrangement for conmeeting and disconnecting drive to one of the pumps.

Other objects and features of the present invention will be apparent upon a perusal of the following specification and drawings of which:

FIGURE 1 is a side elevational view of an engine carrying the pump driving means of the present invention;

FIGURE 2 is an enlarged cross-sectional view of the pump driving means of FIGURE 1 and taken along the line 2-2 of FIGURE 1;

FIGURE 3 is an enlarged partially cross-sectional view of the curved plate and lever means shown in FIGURE 2 for selectively engaging or disengaging one of the hydraulic pumps;

FIGURE 4 is an enlarged partially cross-sectional view of the pump drive means shown in FIGURE 2 and taken along the line 44 of FIGURE 2; and

FIGURE 5 is an enlarged view of the lever and curved plate means of FIGURE 1 for selectively engaging or disengaging one of the pumps.

The present embodiment is the preferred embodiment, but it is to be understood that changes can be made in the present embodiment by one skilled in the art without departing from the spirit and scope of the present invention.

For a general description of the present invention, reference is made to the drawings. The pump driving means of the invention includes a housing having two sections which are bolted together, one section being secured to one side of the engine in a position whereby a gear therein may be driven from either the camshaft or crankshaft of the engine. The other housing section is bolted to the first section and a pair of hydraulic pumps are in turn mounted on the second housing section. One of the pumps has a gear secured to the end of the pump operating shaft, which gear meshes with a suitable gear on the camshaft or crankshaft of the engine. Thus it may be seen that that pump is driven whenever the englue is operating. The operating shaft of that pump "ice also carries a second gear secured thereon between the gear at the end of the shaft and the pump housing. A pump idler gear is also carried in the pump drive housing and is rotatively carried on a shaft intermediate the ends thereof. The idler gear is prevented from any longitudinal movement relative to its shaft. That shaft is slidably mounted through and in the pump drive housing with one end projecting outwardly from the housing and has a certain looking lever arrangement connected thereto. The second pump is also carried on the pump drive housing and has its operating shaft extending therewithin with a driving gear keyed thereon. The driving gear for the second pump is so disposed relative to the idler gear and the second gear on the first pump shaft that when the shaft for the idler gear is moved to its innermost position of the pump drive housing, the idler gear engages the second gear on the first pump shaft and the pump driving gear for the second pump. When the shaft for the idler gear is moved outwardly of the pump drive housing, the idler gear is disengaged from the two described gears and the second pump is not operated. A curved plate having a slot therein is carried on the pump drive housing in cooperation with the lever means on the idler gear shaft. The plate has a slot formed therethrough which is angled to the axis of the idler gear shaft so that when the lever is moved to rotate the idler gear shaft in one direction, the inclined sides of the slot will cause the idler gear shaft to be moved outwardly of the pump drive housing to disengage any drive to the second pump. When the lever is moved in the opposite direction in the slot, the idler gear shaft is moved inwardly of the pump drive housing to engage the idler gear with the described gears of the two pumps to cause the second pump to be operated.

For a detailed description of the present invention, continued reference is made to the drawings. The'engine 10 which is shown merely by way of environment has a radiator 11 connected at the forward end thereof. To the engine 10, the pump drive housing 12 is secured. The pump drive housing 12 comprises a forward section 12a and a rearward section 12b, the two sections being secured together by a series of fasteners 13. The section 12a is secured to the engine 10 over a suitable engine driven gear (not shown). That gear is in turn drivingly connected to gear 14. Gear 14 is keyed to the shaft 15, and shaft 15 is in turn connected to drive pump 16 as the operating shaft thereof. Pump 16 is secured to section 12b of the pump drive housing 12 by bolts 17 shown in FIGURE 2. The pressure and suction lines 19 and 21} of the pump 16 are shown in FIGURE 1. A gear 21, which is partially shown in dotted lines in FIGURE 2 and is positioned behind the gear 22 shown in FIGURE 4, is keyed on the shaft 15. Thus it may be seen that when the engine 10 is operating, the gear 14 is rotated to rotate shaft 15 which in turn will operate the pump 16 and rotate gear 21.

The second pump 23 is alsorcarn'ed on the section 1212 of the pump drive housing 12, and is secured there-. to by fasteners 24 which may be seen in FIGURE 2. The pump 23 is provided with pressure and suction lines 2 5 and 26. The operating shaft 27 of the second pump 23 extends into the pump drive housing 12 and is journalled in suitable bearings 28 carried in sections 12a and 12b of the pump drive housing 12. Although bearings are not shown for the other rotating shafts of the present invention, it is intended that any suitable bearings therefor be provided. A gear 30 is keyed on the shaft 27 in alignment with gear 21'on shaft 15.

The drive to the second pump driving gear 30 is through an idler gear 22. The idler gear 22 is mounted on a shaft 32 for free rotation relative to the shaft 32.

while prevented from any movement longitudinally of the shaft 32. The shaft 32 is reciprocably and rotatably mounted in the pump drive housing 12 and one end thereof extends outwardly of the housing. The shaft 32 is so disposed relative to the gears 21 and 39 that when the shaft 32 is moved to its innermost position such as shown in FIGURE 4, gear 22 is meshed with gears 21 and 30, and when shaft 32 is moved to its outermost position, such as shown in the dotted lines in FIGURE 4, gear 22 is disengaged from gears 21 and 30.

A novel means for reciprocating shaft 32 is provided, and comprises a curved plate 33 and a lever assembly 34. As may be seen in FIGURES 2 and 3, the plate 33 has a curvature substantially equal to the curvature of the gear 22 and is secured to the section 1212 of the pump drive housing 12 by bolts 35 at a position over a peripheral portion of the gear 22 and concentric with the shaft 32. The curved plate 33 is provided with a slot 36 formed therethrough. The slot 36 has an enlarged portion at each end thereof and is disposed at an angle to the axis of shaft 32. The lever assembly 34- comprises a rod or lever arm 37 which is secured through the outer end of the shaft 32 at a right angle to the axis of shaft 32. Referring to FIGURES 3 and 5, it may be seen that the rod 37 has a diameter substantially equal to the width of the intermediate portions of the slot 36, and that the outer end of the rod 37 is provided with a flange 38 which extends into a handle portion 39. The handle portion 39 has a reduced cylindrical portion 4% at the lower or inner end thereof, and the diameter of the portion 46 is substantially equal to the diameter of the enlarged sections at each end of the slot 36. The handle portion 3 further has a cylindrical opening therein which is substantially equal to the diameter of the flange 38 on the rod 37 with the end adjacent the portion 40 being reduced in diameter to substantially the diameter of the rod 37. A compressed coiled spring 41 is carried in the, handle portion 39 and is positioned between the flange 38 on the rod 37 and the reduced portion of the handle 39 so that the handle portion 39 is biased by the spring 41 toward the curved plate 33. Thus it may be seen that when the handle portion of the lever assembly 34 is manually drawn outwardly from the curved plate 33 to further compress the coiled spring 41, the portion 40 is disengaged from the enlarged sections of the slot 36 and the lever assembly 34 may then be moved to move the rod 37 to the other end of the slot 36. Release of the handle portion 39 of the lever assembly 34 will then cause the portion 4b to engage the enlarged section of the slot 36 at the other end thereof to lock the lever assembly 34 in that position. The movement of the rod 37 in the slot 36 causes a rotation and longitudinal displacement or reciprocation of the shaft 32, andthe angle of the slot 36 to the axis of the shaft 32 is selected as one wherein the gear 22 meshes with gears 21 and 30 when the lever assembly 34 is in the lower end of the slot 36 and the gear 22 is disengaged from the gears 21 and 30 when the lever assembly 34 is in the uppermost position.

Fromthe foregoing it may be seen that the subject invention provides a relatively simple and positive arrangement whereby one pump is driven from an engine with certain means for selectively engaging or disengaging a second pump for drive from the same power take-off gear.

Having described the invention, what is considered new and desired to be protected by Letters Patent is:

'1. A power take-off arrangementfor a pair of power transfer devices, means connectible to an engine and connected to the operating shaft of one of said devices for driving said one device, and means for driving the other of said devices comprising a shaft longitudinally reciprocable between two positions, gearing means on the operating shaft of said other device, gearing on the operating shaft of said one device, and gearing on said longitudinally reciprocable shaft, said last-mentioned gearing being formed so that when said shaft is in one of said two positions said gearing of said one device engages said gearing on said reciprocable shaft and said gearing on said reciprocable shaft engages said gearing means on the operating shaft of said other device and further being formed so that in the other of said two positions any drive to said other device is disengaged, means for longitudinally reciprocating said shaft between said two positions comprising a curved plate secured in said arrangement and positioned concentrically with one end of said reciprocable shaft, -a slot formed through said curved plate at an angle to the axis of said reciprocable shaft, a lever arm carried in one end of said reciprocal shaft and positioned at a right angle to the longitudinal axis of said reciprocable shaft and extending through said slot in said curved plate, the angle of said slot being one wherein said reciprocable shaft is moved between said two positions when said lever arm is moved from one end of said slot to the other end thereof.

2. In a power take-off arrangement as claimed in claim 1 wherein said slot has a width substantially equal to the diameter of said lever arm and wherein each end portion of said slot is enlarged, a spring-biased handle mounted on the outer end of said lever arm and biased toward said curved plate, the lower end of said handle having a size substantially equal to the size of said enlarged portions at each end of said slot whereby said lever arm is locked against movement when the lower portion of said handle is positioned in the enlarged portions at each end of said slot and whereby said lever arm is freely movable between the end portions of said slot when the lower end of said handle is withdrawn from said enla ged portions at each end of said slot.

3. A power take-off arrangement for a pair of power transfer devices, means connectable to an engine for driving one of said devices, means for driving the other of said devices comprising a shaft longitudinally reciprocable between two positions to drivingly connect the other of said devices to said one device in one of said two positions, means for longitudinally reciprocating said shaft between said two positions comprising a curved plate secured in said arrangement and positioned concentrically about one end of said shaft, 21 slot including an intermediate portion and end portions formed through said curved plate at an angle to the axis of said shaft, a lever arm secured at one end to said one end of said shaft and positioned through said slot, the angle of said slot to the axis of said shaft being sufficient to cause said shaft to be longitudinally moved between said two positions, said intermediate portion of said slot having a width substantiallyequal to the diameter of said lever arm and wherein each end portion of said slot is enlarged, a spring biased handle mounted on the outer end of said lever arm; the lower end of said handle having a size substantially corresponding to the enlarged end portions of said slot, whereby said lever arm is releasably locked at each end portion of said slot that corresponds to one of said two positions of said longitudinally movable shaft, and and whereby said lever arm is freely movable between said end portions when the lower portion of said handle is moved out of engagement with said end portions of said slot.

4, A power takeoff arrangement for a pair of power transfer devices, means connect-able to an engine and connected to the operating shaft of one of said devices for driving said one device, and means, for driving the other of said devices comprising a shaft longitudinally reciprocable between two positions, gearing means on the operating shaft of said other device, gearing on the operating shaft of said one device, and gearing on said longitudinally reciprocable shaft, said last-mentioned gearing being formed so that When said shaft is in one of said two positions said gearing of said one device engages said gearing on said reciprocable shaft and said gearing on said reciprocable shaft engages said gearing means on the operating shaft of said other device and further being formed so that in the other of said two positions any drive to said other device is disengaged, means for longitudinally reciprocating said shaft between said two positions comprising a curved plate secured in said arrangement and positioned concentrically about one end of said shaft, a slot including an intermediate portion and end portions formed through said curved plate at an angle to the axis of said shaft, a lever arm secured at one end to said one end of said shaft and positioned through said slot, the angle of said slot to the axis of said shaft being sufficient to cause said shaft to be longitudinally moved 15 between said two positions, said intermediate portion of said slot having a width substantially equal to the diameter of said lever arm and wherein each end portion of said slot is enlarged, a spring biased handle mounted on the outer end of said lever arm, the lower end of said handle having a size substantially corresponding to the enlarged end portions of said slot, whereby said lever arm is releasably locked at each end portion of said slot that corresponds to one of said two positions of said longitudinally movable shaft, and whereby said lever arm is freely movable between said end portions when the lower portion of said handle is moved out of engagement with 10 said end portions of said slot.

References Cited in the file of this patent UNITED STATES PATENTS 2,127,186 Perkins Aug. 16, 1938 2,458,452 Vanni Jan. 4, 1949 2,543,564 Bakewell Feb. 27, 1951 2,847,866 Thllrmond Aug. 19, 1958 2,907,221 Haupt Oct. 6, 1959 

